IRCT20221018056229N1 IRCT 2023-01-28 Iran University of Medical Sciences Investigating the efficacy and safety of platelet rich plasma in treating hair loss of patients with lichen planopilaris Lichen Planopilaris (LPP) Investigating the efficacy and safety of platelet rich plasma and topical clobetasol in treating hair loss of patients with lichen planopilaris in comparison to the patients who only use topical clobetasol 2022-12-05 anticipated 22 Complete https://irct.ir/trial/66624 interventional Randomization: Not randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. 3 Scalp hair lichen planopilaris. Intervention 1: Intervention group: the patients will receive Behvazan topical clobetasol 0.05% lotion 20 drops every night, and they will also receive 3 courses of PRP in 1-month intervals. Each PRP treatment session is as described subsequently: After aspirating 20cc of the patient's venous blood, the blood is centrifuged in 4 citrated sample tubes with 1500rpm in the Iranian Universal centrifuge device. Then the middle part of the plasma (rich with platelets) is extracted and injected intradermally into the patient's scalp with a 30-gauge needle. Intervention 2: Control group: the patients will receive Behvazan topical clobetasol 0.05% lotion 20 drops every night. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is No decisions have been made on this particular matter.